Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gixsmu

Test String

Code Generator

Language

Generated Code

use strict; my $str = 'r22 pcd 4x108 ET 45.5 ЦО 58.5 15 /5.0j 6*108 et45 ЦО 58.5 15/ 5.0j 4x108 -45.5 58.5 pcd 4x138 15/5.0j ET58.5 ЦО45 ЦО45.5 ET58.5 19 pcd 4x 108 r15/5.6j pcd 5х112 ET60 CB66 et50 r15/5 5х112 ET60 d66 r15/5 pcd 5*112 ET60 dia 66 5.6j x 15.5 pcd 5 х 112 ет -60 CB66 5x15.5 5х112.5 ET60 CB66 250/50 r16'; my $regex = qr/# Start defining (?(DEFINE) (?<XSEP>\s*[xх\*\-\s]?\s*) (?<MARGIN>(?:\.\d)?) (?<RADIUS>r?[12]\d(?&MARGIN)) (?<J>(?:1[01]|[4-9])(?&MARGIN)j?) (?<DIAM> \b (?: (?&RADIUS)(?:\s*\/\s*(?&J))? | (?&J)(?&XSEP)(?&RADIUS) ) \b ) (?<PCD>\b(?:[pb]cd\s*)?[34568](?&XSEP)(?:98|[12]\d{2})(?&MARGIN)\b) (?<ET>(?:(?:et|ет)\s*)?\-?\d+(?&MARGIN)\b) (?<CB>\b(?:(?:цо|cb|d(?:ia)?)\s*)?\d{2,3}(?&MARGIN)\b) ) # End defining (?: (?<diam>(?&DIAM)) | (?<pcd>(?&PCD)) | (?<et>(?&ET)) | (?<cb>(?&CB)) )/ixsmup; if ( $str =~ /$regex/g ) { print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n"; # print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n"; # print "Capture Group 2 is $2 ... and so on\n"; } # ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p' # Named capture groups can be called via $+{name}

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html